Swallowing food

Kate
Okay, so I've got a new symptom that I was wondering if anyone had any tips about.  I'm having a really hard time chewing and swallowing food. It's almost like a mental block, but the idea of swallowing food makes me gag really bad.  I've already lost 6lbs in the last two weeks. I'm trying to eat, but every bite I gag.  
Anyone been through this before? What should I do?